This is much like the lesson program that @Monique has used at Breck for several years. Vail is changing programs like this to eventually phase them out.
I found an email from back in 2008 about Breck lesson club. So I've been participating AT LEAST that long. At that time, it was every Thursday through Sunday except for blackout periods, and it was always just barely more than the cost of two lessons.
I would be very interested in any solid intel about phasing out the programs. I certainly have suspected as much for years, but so far it seems to be the "frog in a pot" approach, becoming more expensive and less beneficial every year. The Breck webpage about the lesson program currently lists the cost as about equivalent to paying for the same number of walk-up lessons, but it also lists the current season's exact dates, so I'm hoping it's some default value and not reality.
AFAIK Keystone still has the old style lesson club - four days a week, unlimited except for blackout days, and students are mixed in with walk-up students. And they have trouble putting together groups of ripper skiers, so the people who do the club tend to have to ski with level 6 and 7 groups.
I suspect Breck's program is a victim of its own success - not only has it become incredibly popular, but many of us have advanced significantly in both skill and terrain, and there are enough of us that the program is very top heavy. That means that we are a major component of the lift lines serving the tastiest runs, and also that we monopolize the most qualified and/or most aggro instructors at Breck. (The flip side, that we also keep their best instructors happy by providing consistent income during off-peak and by giving them classes that can lap challenging terrain all day long, is probably overlooked by upper management.) And they can't just swap in other instructors. There are very few instructors who can keep up with the top several groups. (I can hear the pitchforks being deployed now. Look, instructors, just trust me on this one. When the regular instructors can't be there, the subs ... do not do well. )
Anyway, I have always believed that the program was too good to be true. It's a lot more restrictive now, but I have no doubt it will continue becoming more expensive and more restrictive until the regulars just give up. Maybe we'll move to Keystone ...